Characteristic analysis of streaming media server
The real-time streaming media storage server adopts the professional network real-time streaming technology, which is the core of telecommunications multimedia switches, to realize the forwarding of large-capacity network video data. It is a server-level product in the network digital video surveillance system. The level of streaming media technology directly affects the quality of many effects of online video. It not only solves the "bottleneck" problem when multiple sub-controllers access the same video at the same time in online video, but also meets the requirements for real-time and smooth video switching. In terms of storage, it solves the problems of hard disk service life, disk fragmentation, magnetic head scheduling, etc. when IPSAN is used in high-definition video recording. Combining multi-manufacturer compatibility, centralized storage functions, and special functions for the security industry such as alarm broadcasting, it is a professional streaming media for the security industry and an indispensable core product in large-scale network video surveillance systems. Its 6 major characteristics are as follows:
1. Patrol by wheel
The entire system adopts a new disk-based patrol strategy to prevent the hard disk from being fragmented. IPSAN adopts a large partition method. When the partition is full, the only way is to delete files. After long-term recording, a large number of disk fragments will be generated, and the speed of deleting files and reading and writing files will continue to slow down. This product adopts the disk-based polling method. When one disk is full, it will jump to the next disk. After all hard disks are full, the previous disk will be formatted. Deleting files no longer takes up hard disk time. At the same time, it completely solves the problem of disk fragmentation. When writing files, it is always in an ideal state and the speed of reading files is very fast. It is also the fastest, because only one disk is working at all times, while the other disks are in a dormant state, which prolongs the service life of the hard disk. It also reduces the frequency of power use, slows down the aging rate of the power supply, indirectly and stably protects the power supply of the hard disk, and implements multiple measures to extend the service life of the hard disk.
2. Use block writing to prevent the magnetic head from running around
1 channel 1080P can reach up to 8M code stream. The standard packet size on Ethernet is 1500 bytes. IPC manufacturers such as HK will send out 4096 byte size packets, 256 packets per second. 64 channels can send up to 16384 data packets. If traditional If you add IPSAN to the platform software and receive a packet and write it once, it will cause one or more disks to run back and forth 16,000 times in 64 different positions. The theoretical rotation speed of the magnetic head is 7200 rpm, which is equivalent to doing nothing, and running back and forth is not fast enough. The storage matrix adopts a block writing method, writing 128kbyte or 256kbyte at a time, which means 4-8 writes per second. This technical advantage not only directly extends the service life of the hard disk, but also greatly increases the number of parallel input channels. After IPSAN, the storage matrix has become a truly alternative technology for centralized storage in the monitoring industry.
3. The industry’s original one-click review function
In actual project applications, we found that the video content before 30 seconds is the most effective, mainly to supplement the lack of a certain delay in the response awareness of the monitoring personnel. The video playback function of NVR and IPSAN is limited by the minimum package file and can only play back videos half an hour ago. During playback, you need to enter the interface to enter a time period, select a video and other series of actions, and retrieve the video before playback. The whole process is relatively cumbersome and time-consuming, which misses the optimal time for this operation.We have implemented a video playback function. When you find something abnormal with a certain camera just now, you can use the matrix keyboard to switch to the playback in the fastest way. This can last until the time point when the playback starts. After confirmation, you can switch back to real-time video through the matrix keyboard, or the two windows can be used in real time and playback at the same time.
4. Stability, real-time streaming one-to-many network forwarding function
Adopting Realtime Stream technology, the core of telecom multimedia switches, it realizes real-time forwarding of large-capacity network video data, breaks through the limitation of up to four seconds delay of File Stream commonly used in the security industry, and reaches the industry requirement standard of telecom grade within 600 milliseconds. It also realizes one-to-many control of PTZ and one-to-many broadcast of alarm signals.
5. The 72TB network disk storage array function uses redundant recording to prevent file connections from being lost
The integrated design of storage and streaming media supports scheduled recording, loop recording, mobile frame measurement recording and video playback functions. A single machine has 72TB of storage, including 24 SATAII hard drive bays within 3000G. 4-8 seconds of redundant recording provides double insurance for critical moments when the two files are disconnected and reconnected, and across days, months, and years, ensuring that there is no missing recording data.
6. Dual network port network load balancing, multi-machine networking full cross matrix switching function
1. Patrol by wheel
The entire system adopts a new disk-based patrol strategy to prevent the hard disk from being fragmented. IPSAN adopts a large partition method. When the partition is full, the only way is to delete files. After long-term recording, a large number of disk fragments will be generated, and the speed of deleting files and reading and writing files will continue to slow down. This product adopts the disk-based polling method. When one disk is full, it will jump to the next disk. After all hard disks are full, the previous disk will be formatted. Deleting files no longer takes up hard disk time. At the same time, it completely solves the problem of disk fragmentation. When writing files, it is always in an ideal state and the speed of reading files is very fast. It is also the fastest, because only one disk is working at all times, while the other disks are in a dormant state, which prolongs the service life of the hard disk. It also reduces the frequency of power use, slows down the aging rate of the power supply, indirectly and stably protects the power supply of the hard disk, and implements multiple measures to extend the service life of the hard disk.
2. Use block writing to prevent the magnetic head from running around
1 channel 1080P can reach up to 8M code stream. The standard packet size on Ethernet is 1500 bytes. IPC manufacturers such as HK will send out 4096 byte size packets, 256 packets per second. 64 channels can send up to 16384 data packets. If traditional If you add IPSAN to the platform software and receive a packet and write it once, it will cause one or more disks to run back and forth 16,000 times in 64 different positions. The theoretical rotation speed of the magnetic head is 7200 rpm, which is equivalent to doing nothing, and running back and forth is not fast enough. The storage matrix adopts a block writing method, writing 128kbyte or 256kbyte at a time, which means 4-8 writes per second. This technical advantage not only directly extends the service life of the hard disk, but also greatly increases the number of parallel input channels. After IPSAN, the storage matrix has become a truly alternative technology for centralized storage in the monitoring industry.
3. The industry’s original one-click review function
In actual project applications, we found that the video content before 30 seconds is the most effective, mainly to supplement the lack of a certain delay in the response awareness of the monitoring personnel. The video playback function of NVR and IPSAN is limited by the minimum package file and can only play back videos half an hour ago. During playback, you need to enter the interface to enter a time period, select a video and other series of actions, and retrieve the video before playback. The whole process is relatively cumbersome and time-consuming, which misses the optimal time for this operation.We have implemented a video playback function. When you find something abnormal with a certain camera just now, you can use the matrix keyboard to switch to the playback in the fastest way. This can last until the time point when the playback starts. After confirmation, you can switch back to real-time video through the matrix keyboard, or the two windows can be used in real time and playback at the same time.
4. Stability, real-time streaming one-to-many network forwarding function
Adopting Realtime Stream technology, the core of telecom multimedia switches, it realizes real-time forwarding of large-capacity network video data, breaks through the limitation of up to four seconds delay of File Stream commonly used in the security industry, and reaches the industry requirement standard of telecom grade within 600 milliseconds. It also realizes one-to-many control of PTZ and one-to-many broadcast of alarm signals.
5. The 72TB network disk storage array function uses redundant recording to prevent file connections from being lost
The integrated design of storage and streaming media supports scheduled recording, loop recording, mobile frame measurement recording and video playback functions. A single machine has 72TB of storage, including 24 SATAII hard drive bays within 3000G. 4-8 seconds of redundant recording provides double insurance for critical moments when the two files are disconnected and reconnected, and across days, months, and years, ensuring that there is no missing recording data.
6. Dual network port network load balancing, multi-machine networking full cross matrix switching function
It uses standard TCP/IP (LAN/Ethernet (RJ-45) dual 1000M network ports) input and output to achieve isolation of internal and external networks and network load balancing, and solves the problem of more than 300 channels of high-definition video requiring 10G core switches through multiple subnets. Multi-machine networking full cross matrix switching is performed through the switch to achieve ultra-large networked monitoring systems such as 256 inputs and 256 outputs (16 screens), 512 inputs and 512 outputs (32 screens). Contains IP routing and gateway functions, which isolates the front-end IPC from the back-end access network, and physically cuts the monitoring network into multiple areas. Reduce the network pressure on the central backbone network, reduce the occurrence of network storms, and ensure the stability of the backbone.
Shenzhen Xldcctv Security Technology Co., Ltd. is a high-tech enterprise integrating R&D, production and sales of professional digital high-definition surveillance systems. The company's digital matrix, streaming media server, network high-definition camera and other surveillance products are widely used in projects in major cities to protect your life!
This article comes from: Xlda Security www.xldcctv.com
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